actions: Remove log_event and its legacy settings.

Now that we've finally converted these to use RealmAuditLog, we can
remove this ultra-legacy bit of code.

zerver/lib/actions.py

@@ -2,7 +2,6 @@ import datetime
 import itertools
 import logging
 import os
-import platform
 import time
 from collections import defaultdict
 from operator import itemgetter
@@ -73,7 +72,6 @@ from zerver.lib.cache import (
     user_profile_by_api_key_cache_key,
     user_profile_by_email_cache_key,
 )
-from zerver.lib.context_managers import lockfile
 from zerver.lib.create_user import create_user, get_display_email_address
 from zerver.lib.email_mirror_helpers import encode_email_address, encode_email_address_helper
 from zerver.lib.email_notifications import enqueue_welcome_emails
@@ -256,25 +254,6 @@ def subscriber_info(user_id: int) -> Dict[str, Any]:
         'flags': ['read']
     }
 
-# Store an event in the log for re-importing messages
-def log_event(event: MutableMapping[str, Any]) -> None:
-    if settings.EVENT_LOG_DIR is None:
-        return
-
-    if "timestamp" not in event:
-        event["timestamp"] = time.time()
-
-    if not os.path.exists(settings.EVENT_LOG_DIR):
-        os.mkdir(settings.EVENT_LOG_DIR)
-
-    template = os.path.join(settings.EVENT_LOG_DIR,
-                            '%s.' + platform.node() +
-                            timezone_now().strftime('.%Y-%m-%d'))
-
-    with lockfile(template % ('lock',)):
-        with open(template % ('events',), 'a') as log:
-            log.write(ujson.dumps(event) + '\n')
-
 def can_access_stream_user_ids(stream: Stream) -> Set[int]:
     # return user ids of users who can access the attributes of
     # a stream, such as its name/description.
@@ -3726,11 +3705,6 @@ def do_create_realm(string_id: str, name: str,
     if settings.BILLING_ENABLED:
         do_change_plan_type(realm, Realm.LIMITED)
 
-    # Log the event
-    log_event({"type": "realm_created",
-               "string_id": string_id,
-               "emails_restricted_to_domains": emails_restricted_to_domains})
-
     sender = get_system_bot(settings.NOTIFICATION_BOT)
     admin_realm = sender.realm
     # Send a notification to the admin realm

zerver/tests/test_event_system.py

@@ -1,5 +1,3 @@
-import os
-import shutil
 import time
 from typing import Any, Callable, Dict, List
 from unittest import mock
@@ -8,12 +6,7 @@ import ujson
 from django.conf import settings
 from django.http import HttpRequest, HttpResponse
 
-from zerver.lib.actions import (
-    check_send_message,
-    do_change_user_role,
-    do_set_realm_property,
-    log_event,
-)
+from zerver.lib.actions import check_send_message, do_change_user_role, do_set_realm_property
 from zerver.lib.events import fetch_initial_state_data, get_raw_user_data
 from zerver.lib.test_classes import ZulipTestCase
 from zerver.lib.test_helpers import POSTRequestMock, queries_captured, stub_event_queue_user_events
@@ -38,27 +31,6 @@ from zerver.tornado.views import get_events
 from zerver.views.events_register import _default_all_public_streams, _default_narrow
 
 
-class LogEventsTest(ZulipTestCase):
-    def test_with_missing_event_log_dir_setting(self) -> None:
-        with self.settings(EVENT_LOG_DIR=None):
-            log_event(dict())
-
-    def test_log_event_mkdir(self) -> None:
-        dir_name = os.path.join(settings.TEST_WORKER_DIR, "test-log-dir")
-
-        try:
-            shutil.rmtree(dir_name)
-        except OSError:  # nocoverage
-            # assume it doesn't exist already
-            pass
-
-        self.assertFalse(os.path.exists(dir_name))
-        with self.settings(EVENT_LOG_DIR=dir_name):
-            event: Dict[str, int] = {}
-            log_event(event)
-        self.assertTrue(os.path.exists(dir_name))
-
-
 class EventsEndpointTest(ZulipTestCase):
     def test_events_register_endpoint(self) -> None:
 

zproject/computed_settings.py

@@ -31,7 +31,6 @@ from .configured_settings import (
     EMAIL_BACKEND,
     EMAIL_HOST,
     ERROR_REPORTING,
-    EVENT_LOGS_ENABLED,
     EXTERNAL_HOST,
     EXTERNAL_HOST_WITHOUT_PORT,
     EXTERNAL_URI_SCHEME,
@@ -688,15 +687,6 @@ SCHEDULED_MESSAGE_DELIVERER_LOG_PATH = zulip_path("/var/log/zulip/scheduled_mess
 RETENTION_LOG_PATH = zulip_path("/var/log/zulip/message_retention.log")
 AUTH_LOG_PATH = zulip_path("/var/log/zulip/auth.log")
 
-# The EVENT_LOGS feature is an ultra-legacy piece of code, which
-# originally logged all significant database changes for debugging.
-# We plan to replace it with RealmAuditLog, stored in the database,
-# everywhere that code mentioning it appears.
-if EVENT_LOGS_ENABLED:
-    EVENT_LOG_DIR: Optional[str] = zulip_path("/home/zulip/logs/event_log")
-else:
-    EVENT_LOG_DIR = None
-
 ZULIP_WORKER_TEST_FILE = '/tmp/zulip-worker-test-file'
 
 

zproject/default_settings.py

@@ -223,11 +223,6 @@ EXTRA_INSTALLED_APPS = ['analytics']
 # Default GOOGLE_CLIENT_ID to the value needed for Android auth to work
 GOOGLE_CLIENT_ID = '835904834568-77mtr5mtmpgspj9b051del9i9r5t4g4n.apps.googleusercontent.com'
 
-# Legacy event logs configuration.  Our plans include removing
-# log_event entirely in favor of RealmAuditLog, at which point we
-# can remove this setting.
-EVENT_LOGS_ENABLED = False
-
 # Used to construct URLs to point to the Zulip server.  Since we
 # only support HTTPS in production, this is just for development.
 EXTERNAL_URI_SCHEME = "https://"

zproject/dev_settings.py

@@ -73,7 +73,6 @@ INVITES_MIN_USER_AGE_DAYS = 0
 EMBEDDED_BOTS_ENABLED = True
 
 SAVE_FRONTEND_STACKTRACES = True
-EVENT_LOGS_ENABLED = True
 STAGING_ERROR_NOTIFICATIONS = True
 
 SYSTEM_ONLY_REALMS: Set[str] = set()

zproject/test_extra_settings.py

@@ -60,9 +60,6 @@ if "GENERATE_STRIPE_FIXTURES" in os.environ:
 # This allows CasperJS to proceed quickly to the next test step.
 POLL_TIMEOUT = 1000
 
-# Don't use the real message log for tests
-EVENT_LOG_DIR = '/tmp/zulip-test-event-log'
-
 # Stores the messages in `django.core.mail.outbox` rather than sending them.
 EMAIL_BACKEND = 'django.core.mail.backends.locmem.EmailBackend'